Cross references:

Cross references are converted to links to cross-reference sources; see §19.5.1 Converting FrameMaker cross references to HTML.

Hypertext internal links:

Hypertext links (gotolink and openlink link to newlink) are activated in HTML; see §19.5.2 Converting FrameMaker hypertext links to HTML.

ObjectID links:

Links created by FrameMaker for TOC, Index, and other generated lists are enabled; see §19.5.3 Including ObjectID anchors as link targets.

Hypertext “message” commands:

Hypertext message URL and message openlink are activated in HTML; see §19.7 Linking to external destinations.

Paragraph formats:

Links connecting a hierarchy of headings can form a “breadcrumb trail”; see §20.2 Generating trails of links.